{"id":1821,"date":"2024-03-13T14:43:20","date_gmt":"2024-03-13T05:43:20","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e5%a4%89%e6%95%b0%e3%83%91%e3%83%a9%e3%83%a1%e3%83%bc%e3%82%bf%e3%83%bc%e3%81%ae%e5%8f%97%e3%81%91%e6%b8%a1%e3%81%97%e3%82%92%e6%b3%a8%e9%87%88%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6\/"},"modified":"2025-08-02T02:36:07","modified_gmt":"2025-08-01T17:36:07","slug":"java%e3%81%a7%e5%a4%89%e6%95%b0%e3%83%91%e3%83%a9%e3%83%a1%e3%83%bc%e3%82%bf%e3%83%bc%e3%81%ae%e5%8f%97%e3%81%91%e6%b8%a1%e3%81%97%e3%82%92%e6%b3%a8%e9%87%88%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e5%a4%89%e6%95%b0%e3%83%91%e3%83%a9%e3%83%a1%e3%83%bc%e3%82%bf%e3%83%bc%e3%81%ae%e5%8f%97%e3%81%91%e6%b8%a1%e3%81%97%e3%82%92%e6%b3%a8%e9%87%88%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6\/","title":{"rendered":"Java\u3067\u5909\u6570\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u53d7\u3051\u6e21\u3057\u3092\u6ce8\u91c8\u3092\u4f7f\u3063\u3066\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002"},"content":{"rendered":"<p>Java\u3067\u306f\u3001\u5909\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u6e21\u3057\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u6a5f\u69cb\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4f8b\u306e\u30b3\u30fc\u30c9\u3067\u3059\uff1a<\/p>\n<ol>\n<li>\u6700\u521d\u306b\u3001\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30de\u30fc\u30af\u3059\u308b\u305f\u3081\u306e\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.lang.annotation.ElementType;\r\n<span class=\"hljs-keyword\">import<\/span> java.lang.annotation.Retention;\r\n<span class=\"hljs-keyword\">import<\/span> java.lang.annotation.RetentionPolicy;\r\n<span class=\"hljs-keyword\">import<\/span> java.lang.annotation.Target;\r\n\r\n<span class=\"hljs-meta\">@Retention(RetentionPolicy.RUNTIME)<\/span>\r\n<span class=\"hljs-meta\">@Target(ElementType.FIELD)<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-meta\">@interface<\/span> Param {\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u305d\u306e\u5f8c\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3092\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308b\u30af\u30e9\u30b9\u3067\u3001\u305d\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u9001\u4fe1\u3059\u308b\u5909\u6570\u3092\u30de\u30fc\u30af\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Test<\/span> {\r\n    <span class=\"hljs-meta\">@Param<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> String param1;\r\n\r\n    <span class=\"hljs-meta\">@Param<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> param2;\r\n\r\n    <span class=\"hljs-comment\">\/\/ getter\u548csetter\u65b9\u6cd5\u7701\u7565<\/span>\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u6700\u5f8c\u306b\u3001\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u30de\u30fc\u30af\u3055\u308c\u305f\u5909\u6570\u3092\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u53d6\u5f97\u3057\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u53d7\u3051\u6e21\u3057\u3092\u884c\u3046\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.lang.reflect.Field;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ParamUtil<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">setParams<\/span><span class=\"hljs-params\">(Object obj, String param1, <span class=\"hljs-type\">int<\/span> param2)<\/span> <span class=\"hljs-keyword\">throws<\/span> IllegalAccessException {\r\n        Class&lt;?&gt; clazz = obj.getClass();\r\n        Field[] fields = clazz.getDeclaredFields();\r\n        <span class=\"hljs-keyword\">for<\/span> (Field field : fields) {\r\n            <span class=\"hljs-keyword\">if<\/span> (field.isAnnotationPresent(Param.class)) {\r\n                field.setAccessible(<span class=\"hljs-literal\">true<\/span>);\r\n                <span class=\"hljs-keyword\">if<\/span> (field.getType() == String.class) {\r\n                    field.set(obj, param1);\r\n                } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span> (field.getType() == <span class=\"hljs-type\">int<\/span>.class) {\r\n                    field.set(obj, param2);\r\n                }\r\n            }\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u4e3b\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u30c4\u30fc\u30eb\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3059\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Main<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> <span class=\"hljs-keyword\">throws<\/span> IllegalAccessException {\r\n        <span class=\"hljs-type\">Test<\/span> <span class=\"hljs-variable\">test<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Test<\/span>();\r\n\r\n        ParamUtil.setParams(test, <span class=\"hljs-string\">\"hello\"<\/span>, <span class=\"hljs-number\">123<\/span>);\r\n\r\n        System.out.println(test.getParam1());\r\n        System.out.println(test.getParam2());\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u624b\u9806\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3001\u6ce8\u91c8\u3092\u4f7f\u7528\u3057\u3066\u5909\u6570\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u53d7\u3051\u6e21\u3057\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001\u5909\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u6e21\u3057\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3068\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u6a5f\u69cb\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4f8b\u306e\u30b3\u30fc\u30c9\u3067\u3059\uff1a \u6700\u521d\u306b\u3001\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30de\u30fc\u30af\u3059\u308b\u305f\u3081\u306e\u30ab\u30b9\u30bf\u30e0\u30a2\u30ce\u30c6\u30fc [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-1821","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u3067\u5909\u6570\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u53d7\u3051\u6e21\u3057\u3092\u6ce8\u91c8\u3092\u4f7f\u3063\u3066\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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